WO2016073333A1 - Adaptateur mural pour drain souterrain de filtration - Google Patents

Adaptateur mural pour drain souterrain de filtration Download PDF

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Publication number
WO2016073333A1
WO2016073333A1 PCT/US2015/058568 US2015058568W WO2016073333A1 WO 2016073333 A1 WO2016073333 A1 WO 2016073333A1 US 2015058568 W US2015058568 W US 2015058568W WO 2016073333 A1 WO2016073333 A1 WO 2016073333A1
Authority
WO
WIPO (PCT)
Prior art keywords
underdrain
wall
adaptor
vertical end
block
Prior art date
Application number
PCT/US2015/058568
Other languages
English (en)
Inventor
John L. Geibel
Howard J. SWEENEY
Original Assignee
Xylem Water Solutions Zelienople Llc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xylem Water Solutions Zelienople Llc filed Critical Xylem Water Solutions Zelienople Llc
Publication of WO2016073333A1 publication Critical patent/WO2016073333A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
    • B01D24/20—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container
    • B01D24/24—Downward filtration, the container having distribution or collection headers or pervious conduits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/001—Making filter elements not provided for elsewhere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
    • B01D24/46—Regenerating the filtering material in the filter
    • B01D24/4631—Counter-current flushing, e.g. by air

Definitions

  • the present invention relates to a filtration system, and, in particular, to an underdrain with an underdrain wall adaptor for controlling air and water passage between the flume and the underdrain.
  • Gravity filtration systems use a filter media to remove impurities from water.
  • the main components of gravity filters are filter media and underdrain blocks.
  • Underdrain blocks are generally square or rectangular in cross section and may have a long longitudinal axis as compared to their cross section. They are attached end-to-end to form sections called laterals.
  • the filter media sit atop the underdrain blocks.
  • the gravity filtration system works by introducing the solution to be filtered above the filter media. Gravity causes the solution to pass vertically downward through the filter media and into the underdrain block.
  • the underdrain block channels the filtered fluid, which has passed through the filter media, through the underdrain block interior and away from the filter.
  • Gravity filtration systems must be periodically backwashed with water and/or air. However, it can be difficult to create passages for proper distribution of the air and water between the flume and underdrain, or, in some cases, to prevent air from entering the flume from the underdrain.
  • the flume is the chamber for distribution of backwash water and sometimes air and for collection of filtered water.
  • dead zone an area where no backwash water or air can be discharged during the backwashing process for cleaning of the filter media.
  • the dead zone can encompass a large area.
  • the present invention includes a filtration system having an underdrain block and an underdrain wall adaptor.
  • the underdrain block can have a top wall, a bottom wall, and two side walls connecting the top wall and bottom wall to define an underdrain block interior.
  • the underdrain wall adaptor can include a vertical end and horizontal base. The vertical end can extend from the top wall to the bottom wall of the underdrain block and can be configured to mate with an end portion of the underdrain block.
  • the horizontal base can extend from a bottom portion of the vertical end.
  • an underdrain wall adaptor that can include a vertical end and a horizontal base.
  • the vertical end can extend from a top wall to a bottom wall of an underdrain block and can be configured to mate with an end portion of the underdrain block.
  • the horizontal base can extend from a bottom portion of the vertical end.
  • the present invention includes a method of installing an underdrain wall adaptor for a filtration system.
  • the method of installing the underdrain wall adaptor for a filtration system can include: (1) mating an underdrain wall adaptor with an underdrain block; (2) applying a sealant or gaskets on contacting surfaces of the underdrain wall adaptor and/or filter wall; and (3) applying suitable fillet material at a top surface intersection of the vertical end and the filter wall.
  • FIG. 1 shows a perspective view of an underdrain wall adaptor installed on the end portion of an underdrain block according to one aspect of the present invention.
  • FIG. 2 shows a perspective view of an underdrain block without an underdrain wall adaptor installed according to the one aspect of the present invention.
  • FIG. 3 shows a front perspective view an underdrain wall adaptor according to one aspect of the present invention.
  • FIG. 4 shows a rear perspective view of an underdrain wall adaptor of FIG. 3.
  • FIG. 5 shows a rear perspective view of an underdrain wall adaptor according to one aspect of the invention.
  • FIG. 6 shows a front perspective view of an underdrain wall adaptor according to one aspect of the invention.
  • FIG. 7 shows a rear perspective view of the underdrain wall adaptor of FIG. 6.
  • FIG. 8 shows a front perspective of an underdrain wall adaptor according to one aspect of the invention.
  • FIG. 9 shows a rear perspective view of the underdrain wall adaptor of FIG. 8.
  • FIG. 10 shows a front view of an underdrain wall adaptor installed in an underdrain block according to one aspect of the invention.
  • FIG. 11 shows a side perspective view of the underdrain wall adaptor installed in an underdrain block according to one aspect of the invention.
  • FIG. 12 shows a front perspective view of an underdrain wall adaptor installed in an underdrain block according to one aspect of the invention.
  • FIG. 13 shows a rear perspective view of an underdrain wall adaptor installed in an underdrain block according to one aspect of the invention.
  • FIG. 14 shows a cross sectional view of a filtration system without an underdrain wall adaptor installed in an underdrain block.
  • the filtration system can include an underdrain block (2) and an underdrain wall adaptor (4) as installed on an end portion (12) of the underdrain block (2).
  • the underdrain block can include a top wall (14), a bottom wall (16), and two side walls (18) that connect the top wall (14) to the bottom wall (16) to form an underdrain block interior (34).
  • the underdrain block interior (34) can be used as a channel to move filtered fluid that has passed through a filter media away from the filter.
  • underdrain blocks (2) can be square or rectangular in cross section and can have a long longitudinal axis as compared to their cross section. However, underdrain blocks (2) are not limited to such configurations.
  • the underdrain blocks (2) can also be attached end-to-end to form long sections called laterals.
  • an underdrain wall adaptor (4) can be installed on an end portion (12) of an underdrain block (2) such that the underdrain wall adaptor (4) becomes an integral part of the underdrain block (2).
  • FIGS. 3-9 show the underdrain wall adaptor (4) isolated from the underdrain block (2).
  • the underdrain wall adaptor can include a horizontal base (6) and a vertical end (8).
  • the vertical end (8) can be configured to mate with an end portion (12) of the underdrain block (2).
  • the vertical end (8) can include a vertical plate (20) and a mating extension (30).
  • the vertical plate (20) can extend vertically from the top wall (14) to the bottom wall (16) of the underdrain block (20) and from side wall (18) to side wall (18).
  • the vertical plate (20) can attach to an end portion (12) of an underdrain block (2).
  • the mating extension (30) can extend from the vertical plate (20) in the direction of the underdrain block interior (34).
  • the mating extension (30) can be configured to mate with the underdrain block interior (34) to securely attach the underdrain wall adaptor (4) to the underdrain block (2).
  • Beneath a portion of the mating extension (30) can run a passageway (22), which can extend into the upstanding flange (28).
  • the passageway (22) can carry fluid, air, or both fluid and air into the underdrain block interior (34) during the backwash process, or the passageway (22) can carry the filtered fluid out of the underdrain block interior (34) and away from the filter media during the filtration process.
  • the mating extension (30) can have a vertical end hole (36).
  • An aspect of the vertical end hole (36) is shown in FIGS. 6-7.
  • the vertical end hole can be a circular hole centered in the mating extension (30), providing an opening for passage from a cavity (24) to the underdrain block interior (34).
  • the vertical end hole (36) need not be centered in the mating extension (30) in all aspects of the invention.
  • no upstanding flange (28) can be provided that allows fluid or air to enter the underdrain block interior (34).
  • fluid or air can enter the underdrain block interior (34) through the vertical end hole (36).
  • the vertical end hole (36) can vary in size to control the distribution of fluid or air.
  • the vertical end (8) can include a cavity (24) that extends from the vertical plate (20) to the mating extension (30).
  • the vertical end (8) can have an offset configuration or a flush configuration.
  • the flush configuration can be seen in FIG. 3 where no member can protrude from the top portion of the vertical plate (20).
  • the offset configuration can be seen in FIG. 6 where a perpendicular plate can extend from the top portion of the vertical plate (20) in the opposite direction of the horizontal plate (26).
  • the shape of the vertical end (8) will vary based on the configuration of the underdrain block (2) to allow the vertical end (8) to mate with an end portion (12) of an underdrain block (2) and secure the underdrain wall adaptor (4) to the underdrain block (2).
  • FIG. 4 shows one aspect of the vertical end (8), which is not meant to limit the shape of the vertical end (8), as the vertical end (8) can take the shape required to mate with an end portion (12) of an underdrain block (2).
  • the vertical end (8) in FIG. 4 includes a vertical plate (20) and an arc-shaped mating extension (30).
  • This particular aspect of the underdrain wall adaptor (4) can be installed in certain underdrain blocks (2) having an underdrain block interior (34) compatible with the arc-shape mating extension (30) of the vertical end (8) of FIG. 4.
  • the mating extension (30) can slide into a compatibly shaped underdrain block interior (34), while the vertical plate (20) attaches to a compatibly shaped end portion (12) of an underdrain block (2). By doing so, the underdrain wall adaptor (4) is securely attached to the underdrain block (2).
  • the horizontal base (6) is the portion of the underdrain wall adaptor (4) that extends horizontally, in the direction perpendicular to the vertical end (8).
  • the horizontal base (6) can connect to the vertical end (8) to make up the underdrain wall adaptor (4).
  • the horizontal base (6) can include a horizontal plate (26), an upstanding flange (28), and a central opening (32).
  • the horizontal plate (26) can intersect and extend from the bottom portion of the vertical plate (20) in a horizontal direction.
  • the horizontal plate (26) can fit flush with the bottom wall (16) of the underdrain block (2).
  • the ribs attached to the bottom wall (16) of the underdrain block (2) can be removed to accommodate the horizontal plate (26) fitting flush with the bottom wall (16).
  • the upstanding flange (28) can extend up from and sit atop the horizontal plate (26).
  • the upstanding flange (28) can be configured to receive air, fluid, or both air and fluid from the passageway (22) during the backwashing process.
  • the upstanding flange can also be configured to receive filtered fluid from the underdrain block interior (34) and allow water to flow out through the passageway (22) and into the flume during filtration.
  • the horizontal base (6) has a central opening (32).
  • the central opening (32) can be an opening in the horizontal base (6) that, in some aspects of the invention, can extend up through the upstanding flange (28).
  • the central opening (32) can allow fluid, air, or fluid and air, which entered the system by flowing through the passageway (22) and up through the upstanding flange (28) to enter the underdrain block interior (34).
  • the central opening (32) is not necessarily centered exactly on horizontal base (6) but merely is an opening of the horizontal base (6).
  • the horizontal base (6) can have an offset configuration or a flush configuration.
  • the flush configuration can be seen in FIG. 4 where no member can protrude downward from the end portion of the horizontal plate (26) opposite the vertical end (8).
  • the offset configuration can be seen in FIG. 5 where, a perpendicular plate can extend downward from the end portion of the horizontal plate (6) opposite the vertical end (8).
  • the horizontal base (6) can intersect the vertical end (8) to form the underdrain wall adaptor (4).
  • the intersection of the horizontal base (6) and the vertical end (8) can form an angle that ranges from 80°-105°, such as from 85°-100°, such as from 87°-95°, and from 89°- 91°. From the angle formed by the intersection of the horizontal base (6) and the vertical end (8), it follows that an angle can be formed from the intersection of the vertical plate (20) and the horizontal plate (26).
  • the angle formed by the intersection of the vertical plate (20) and the horizontal plate (26) can range from 80°-105°, such as from 85°-100°, such as from 87°- 95°, and from 89°-91°.
  • an angle can be formed by the intersection of the mating extension (30) and the upstanding flange (28).
  • the angle formed by the intersection of the mating extension (30) and the upstanding flange (28) can range from 80°-105°, such as from 85°-100°, such as from 87°-95°, and from 89°-91°.
  • a connecting member (38) can be used to attach the plurality of underdrain wall adaptors (4) side-by-side.
  • Each underdrain wall adaptor (4) in the system can have a connecting member (38) that sits atop the vertical end (8) of the underdrain wall adaptor (4).
  • the connecting member (38) of the first underdrain wall adaptor (4) mates with the connecting member (38) of the second underdrain wall adaptor (4) and so on, to create a line of connected underdrain wall adaptors (4).
  • the connecting member (38) can be adjustable to adjust the distance between neighboring underdrain wall adaptors (4). Aspects of the connecting member (38) are shown in FIG. 6-FIG. 9.
  • FIG. 10 and FIG. 11 show an aspect of the underdrain wall adaptor (4) installed in an underdrain block (2) from two different angles.
  • the underdrain wall adaptor (4) can be installed in the underdrain block (2) by any means that securely attaches the underdrain wall adaptor (4) to an end portion (12) of an underdrain block (2).
  • the underdrain wall adaptor (4) can be installed by mating the underdrain wall adaptor (4) with the underdrain block (2); applying a sealant or gaskets on contacting surfaces of the underdrain wall adaptor (4) and/or the filter wall (40); and applying a fillet of suitable material at a top surface intersection of the vertical end (8) and the filter wall (40).
  • the sealant used can be Sikaflex la because it is NSF 61 certified for use with potable water, but Sikaflex la is only one example of a sealant that can be used in the invention.
  • a grout fillet can be used in one aspect of the invention.
  • Mating the underdrain wall adaptor (4) with the underdrain block (2) can be done by sliding the portion of the underdrain wall adaptor (4) that is configured to match an end portion (12) of an underdrain block (2) into an end portion (12) of an underdrain block (2).
  • the filter wall (40) can be a vertical wall that is not part of the filtration system but can be part of the structure that houses the filtration system.
  • the underdrain wall adaptor (4) can be secured and sealed to the filter wall (40).
  • the vertical end (8) includes a vertical plate (20) and a mating extension (30), and the horizontal base (6) includes a horizontal plate (26), an upstanding flange (28), and a central opening (32).
  • the underdrain wall adaptor (4) can be installed in the underdrain block (2) by mating the underdrain wall adaptor (4) with the underdrain block (2); applying a sealant or gaskets on contacting surfaces of the underdrain wall adaptor (4) (including the vertical plate (20)) and/or the filter wall (40); and applying a fillet of suitable material at a top surface intersection of the vertical end and the filter wall (40).
  • the underdrain wall adaptor (4) and the underdrain block (2) can be mated by sliding the mating extension (30) into the underdrain block interior (34).
  • the underdrain wall adaptor (4) can be secured to the filter wall (40) by applying a sealant or gaskets to the underdrain wall adaptor (4) and/or the filter wall (40).
  • the underdrain wall adaptor (4) can be secured to the filter wall (40) by applying sealant or gaskets to the connecting member (38) and/or the filter wall (40) and securing the connecting member (38) to the filter wall (40).
  • the connecting member (38) can be secured flush against the filter wall (40) in this aspect of the invention. This aspect of the invention can be used to create spacing off of the filter wall (40).
  • the underdrain wall adaptor (4) can be secured to the filter wall (40) by applying sealant or gaskets to the vertical plate (20) and/or the filter wall (40) and securing the vertical plate (20) to the filter wall (40).
  • the underdrain wall adaptor (4) can be without a connecting member (38). The vertical plate (20) can secure flush against the filter wall (40).
  • FIGS. 12-13 show an underdrain wall adaptor (4) installed in an underdrain block (2) to make up a filtration system.
  • a filtration system in certain aspects, can include multiple underdrain wall adaptors (4) and multiple underdrain blocks (2).
  • Underdrain wall adaptors (4) can be connected together, side-by-side, to form a system of underdrain wall adaptors (4).
  • underdrain blocks (2) can be connected together, an end portion (12) of one underdrain block (2) connected to an end portion (12) of a second underdrain block (2) to form a line of underdrain blocks (2).
  • This line of underdrain blocks (2) can be called a lateral.
  • a lateral can be connected to an underdrain wall adaptor (4).
  • FIG. 12 and FIG. 13 show a system of three underdrain wall adaptors (4) connected by connecting members (38). Also shown is one underdrain block (2) connected to the middle underdrain wall adaptor (4). Each of the two underdrain wall adaptors (4) on the ends of the middle underdrain wall adaptor (4) are shown in FIGS.
  • each of the vacant underdrain wall adaptors (4) could connect to an underdrain block (2) or lateral.
  • a filtration system therefore, could include parallel rows of laterals with an underdrain wall adaptor (4) at the end of each row of laterals.
  • the filtration system can be installed to filter wall (40).
  • the feed solution in these filtration systems is poured atop the filtering media, which sits above the underdrain block (2).
  • the solution filters through the filtering media, leaving behind unwanted contaminants and flowing filtered water into the underdrain block interior (34).
  • the filter must periodically be backwashed to remove collected contaminants from the filter media. Water and/or air is used for this backwashing process. When both water and air are used for backwashing the filter, there are various arrangements that can be used.
  • the difficulty with using water and air for the backwashing practice is creating passages for air and water for proper distribution of the air and water between the flume— the chamber for distribution of water and sometimes air and for collection of filtered water— and the filtration system or in some cases to prevent air from entering the flume from the filtration system.
  • the underdraiti wall adaptor (4) can extend the entire vertical height of the underdraiti block (2) (top to bottom). In other words the underdrain wall adaptor (4) can extend from the top wall (14) to the bottom wall (16) of the underdrain block (2). This can allow the underdrain block (2) to be installed in the filter tank at a lower elevation, eliminating concrete fill, maximizing the filter tank depth for filter media and improving operation efficiency. This could not be easily accomplished with previous applications. A special orifice plate was usually required as well as concrete fill to get sufficient openings for water passage and for air and water flow control.
  • the underdrain wall adaptor (4) can be made for passage of air and water into a single underdrain lateral. Air and water can pass into a single underdrain lateral through the underdrain wall adaptor (4) when wall openings are on nominal 12-inch centers. Air and water can also pass into a single underdrain lateral through the underdrain wall adaptor (4) with other wall openings on different centers with the underdrain wall adaptors (4) made with connecting members (38). Therefore, the underdrain wall adaptor can be suitable for wall openings with variable spacing as well.
  • the underdrain wall adaptor (4) can be an integral part of the underdrain block (2), once installed. This can eliminate the need for other adaptors between the filter wall (40) and the underdrain block (2), which previously caused the dead zone of 3-4 inches. In certain aspects, the use of an underdrain wall adaptor (4) can reduce the dead zone during the backwashing process to less than 4 inches or 1-2 inches, from filter wall (40) instead of 3-4 inches on top of an underdrain block (2).
  • FIG. 14 shows a filtration system without the underdrain wall adaptor (4) of the present invention.
  • the stainless steel orifice plate can allow water to enter the underdrain block interior (34), while air can enter the system of FIG. 14 on an isolated end of the underdrain block (2).
  • the underdrain wall adaptor (4) can replace the steel orifice plate of FIG. 14.
  • the underdrain wall adaptor (4) described herein can be used for controlling the air and water passage between the flume and underdrain. In one aspect, both water and air can flow through the underdrain wall adaptor (4) and into the underdrain block interior (34).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

L'invention concerne un système de filtration ayant un bloc de drain souterrain et un adaptateur mural de drain souterrain. L'adaptateur mural de drain souterrain comprend une extrémité verticale et une base horizontale. L'extrémité verticale s'étend depuis une paroi supérieure jusqu'à une paroi inférieure d'un bloc de drain souterrain et s'accouple avec une partie d'extrémité d'un bloc de drain souterrain pour fixer l'adaptateur mural de drain souterrain au bloc de drain souterrain. La base horizontale s'étend à partir de l'extrémité verticale. L'invention concerne également un procédé d'installation d'un adaptateur mural de drain souterrain. L'adaptateur mural de drain souterrain commande le passage d'air et d'eau entre le canal et le drain souterrain.
PCT/US2015/058568 2014-11-05 2015-11-02 Adaptateur mural pour drain souterrain de filtration WO2016073333A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201462075606P 2014-11-05 2014-11-05
US62/075,606 2014-11-05
US14/926,572 US10173150B2 (en) 2014-11-05 2015-10-29 Wall adaptor for filter underdrain
US14/926,572 2015-10-29

Publications (1)

Publication Number Publication Date
WO2016073333A1 true WO2016073333A1 (fr) 2016-05-12

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PCT/US2015/058568 WO2016073333A1 (fr) 2014-11-05 2015-11-02 Adaptateur mural pour drain souterrain de filtration

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US (1) US10173150B2 (fr)
WO (1) WO2016073333A1 (fr)

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Publication number Publication date
US20160121240A1 (en) 2016-05-05
US10173150B2 (en) 2019-01-08

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